It comes in two different models: 1. AC adapter power only (VK-011). Built in battery and AC adapter (VK-015). The main display keeps record of the game being played, the small display keeps the number of the won games.

In Manual mode the score counts from 00-00 to 99-99, the remote control "A" and "B" push buttons increment. In Auto mode the won games score changes automatically.

In 11 point mode one game point will be given to the player who has reached 11 points score first, with two points margin. Large display will be reset. In 21 point mode one game point will be given to the player who has reached 21 points score first, with two points margin. Auto 11 point game mode provides servicing sequence indication.

After start (reset) the large display shows 5555, it means that you have to select the player who will be serving first. Press either A or B on remote control. The very left low segment on each side of large display will be indicating the servicing sequence.

After each 2 points have been scored the receiving player becomes the serving player and so on. Until the end of the game, unless both players score 10 points, when the sequence of serving and receiving is the same but each player serves for only 1 point in turn.

Manual or automatic score mode. Changeover switch (The score on display corresponds to the player side). Battery lasts for at least 4-5 hours of operation.

Any questions - feel free to ask. The item "Digital Score Keeper for Table Tennis (Ping Pong), Electronic Scoreboard" is in sale since Sunday, April 15, 2018. This item is in the category "Sporting Goods\Indoor Games\Table Tennis, Ping Pong\Sets". The seller is "hutorok1973" and is located in Palatine, Illinois. This item can be shipped worldwide.